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习题练习:Physics Unit10: Fluids Related Topics



 作者: admin   总分: 80分  得分: _____________

答题人: 匿名未登录  开始时间: 22年07月29日 13:02  切换到: 整卷模式

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1#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The three common pha- 3l lt4 ehjte/tr+ba.ses of matter are

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2#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Density is

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3#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Substance A has a de8au g-gnkeyki *j9 .z0nsity of $3.0 \; g/cm^{3}$ and substance B has a density of $4.0 \; g/cm^{3}$. In order to obtain equal masses of these two substances, the ratio of the volume of A to the volume of B will be equal to

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4#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Pressure is

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5#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which of the following is not a unit of pressur+008 7wj,qaev g qkmtcl9o(xc e?

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6#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider three drinking glasses. All three have the same area base, and alvx ;f s(pd,6 4axdvum)l three are filled to the same depth with water. Glass A is cylindrical. Glass B is wider at the top than at the bottom, and so holds more water than A. Glass C is narrower at the top than at the bottom, and so holds less water d 4avmpx)vu,6;(dsf x than A. Which glass has the greatest liquid pressure at the bottom?

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7#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the differenz1v9d)m6+a qcst j(fpl5xvt;nly k21 4uy;uwce between the pressures inside and outside a tire called?

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8#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When atmospheric pressure changes, what happens to thxtn3/*s/ drsx ra b-wi7//u nfl.p xe3e absolute pressure at the 3xeua7 n/p rrtb xw3ssxi /fn l/d./-*bottom of a pool?

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9#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  You are originally 1.0 mrex xk 9hsk+.jc5,zqs566e h d beneath the surface of a pool. If you dive to 2.0 m beneath the surface, what happens to the absolute pressure on you?c,zk dx9 .ks+eh56sex r5jqh6

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10#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State Pascal's princilzoeb,vf 4, .(* hfhvbple.
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11#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State Archimedes' principle2/ jsr kvu i(-m3u0suc.
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12#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  $50 \; cm^{3}$ of wood is floating on water, and $50 \; cm^{3}$ of iron is totally submerged. Which has the greater buoyant force on it?

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13#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  As a rock sinks deepev +8hpcwq.thp6nk y i u.r+21hr and deeper into water of constant density, what happens to the buoyant wkr. tih hv+8u2 y1p hpq6.n+cforce on it?

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14#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Salt water has greater density than fresh water. A boat floats inqddv cij3: 42 lvnnzeq0 lai:v :c05,t both fresh water and in salt water. Where is the buoyant force greater on tvt2,l3vcndqdie:v::5i zn a q0j 40clhe boat?

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15#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Salt water is more dense than fresh water. A ship fn):ojtr.j2m aloats in both fresh water and salt water. Compared to the fresh water, the volume of wat .omjj2 rn):ater displaced in the salt water is

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16#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A steel ball sinks in water but floats in a pool of mercury. ovsy y0ju o- yw6u. ej-)v7+es1zg3ng Where is the buoyante jyg3s-y.u wjon-vyzo 6v01e)7+gsu force on the ball greater?

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17#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 10-kg piece of aluminum sits at the bottom of a lake,e (0* oy/(cepxm x6noz right next to a 10-kg piece of lead. Which has the greater bempx/ 0(e*zon ocxy 6(uoyant force on it?

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18#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A piece of iron rests on top of a piece of wood floak2q f/ ce,..exrxli -xting in a bathtub. If the iron is remov 2ki e-xrc.xfx,/elq .ed from the wood, what happens to the water level in the tub?

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19#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A piece of wood is flssm;a w 59tz4noating in a bathtub. A second piece of wood sits on top of the first piece, and does not touch the water. If the top piece is taken off and placed in the water, what happen;5t4 nmwazs s9s to the water level in the tub?

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20#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Water flows through a pipe. The dia1 +ybk+xuh9 mnmeter of the pipe at point B is larger than at point ybuxk+hm9 1n+A. Where is the speed of the water greater?

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21#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An ideal fluid flows at 12 m/s in a ho7jy40 tn2v ch eplktp:i4 l.z*rizontal pipe. If the pipe widens to twice its original radius, whp k7l:eyi 24*lnzpv0hjtc4 .tat is the flow speed in the wider section?

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22#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An ideal fluid flows at 12 n9.to1sx/q rom/s in a horizontal pipe. If the pipe narrows to half its original radius, what is the flow spe1 nost q9.xro/ed in the narrower section?

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23#
 
问答题 ( 1.0 分) 切至整卷模式 搜藏此题  
State Bernoulli's priti0 v;u(bb9*o19uixobbs yp/dp4i9 f nciple.
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24#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which one of the follz1wd5 l48fp4g zqjq20 pzg m3wowing is associated with the law of conservation of energy in flg q5 p4wgwj8z4q3zd 2zl0fpm1uids?

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25#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  As the speed of a moving fluid incrc58m1p:l -2loz lradbeases, the pressure in the fluid

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26#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Water flows through a pipe. The diameter cuy(2 up8;w+ 8tojcpo of the pipe at point B is larger than at point A. Where is the water pressu;+ 2 jw(uocppt8o8 ycure greatest?

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27#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When you blow some air above a paper std8c isv,pl-qwka6 /c(rip, the paper rises. This is because

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28#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A sky diver falls thrrp q*5k3j ki,j s2v5ycough the air at terminal velocity. The force of air resistance on h, jsryc p5k 3j5i*2qvkim is

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29#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two Styrofoam balls, of radii R and 2R, are released simultaneously fr:e 3 mgkvl8qc .nw t8-,u vsznm,g20rkom a tall tower. Which 8zm ln.en3gv:-2 uq,0wkkc8 ,s vmtrgwill reach the ground first?

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30#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When a small spherical rock of radius r falls through water, it experien jzp5p;q4 oai0ces a dragijqo5ap zp4;0 force $F=arv$, where $v$ is its velocity and $a$ is a constant proportional to the viscosity of water. From this, one can deduce that if a rock of diameter 2.0 mm falls with terminal velocity, $v$, then a rock of diameter 4.0 mm will fall with terminal velocity .

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31#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Which has the greatest effect on the flow of fl +fnua7tp 8p3(p+ eiwkuid through a narrow pipe? That is, if you made a 10% change in each of tw3pp i+ate( pkn7+uf8 he quantities below, which would cause the greatest change in the flow rate?

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32#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two horizontal pipes are the same length, but pipe B haz-;07 fjctlpd rb g::ns twice the diameter of pipe A. Water underngt -l;jz0r:7bf : cdpgoes viscous flow in both pipes, subject to the same pressure difference across the lengths of the pipes. If the flow rate in pipe A is Q, what is the flow rate in pipe B?

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33#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two horizontal pipes have the same diameter, but pipe B is twice abw49/ufh 895srzo zpa s long as pipe A. Water undergoes viscous flow in both pipes, subject to the same pressure difference across the lengths of the pipes. If the flow rate in pipe B is Q, what is the flow rabau w5fsr8 zhz op9/49te in pipe A?

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34#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When soup gets cold, it often tastes greas6 wo8;(aygibx y. This "greasy" taste seems to be associated with oil spreading out all over the surface of the soup, instead of staying in little globules. To us "physikers",6ywx og(b;8ia this is readily explained in terms of

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35#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  When a tube of diameter d is placed in water, the water rises to a i:ehj y o7n;o1height h. If the diameter we ojih1 :7yne;ore half as great, how high would the water rise?

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36#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Certain insects, such aa8+da+hr8urz ;qqt 7as the water bug, are sufficiently lightweight that they can run on top of water without breaking the surface tension. Water bug A has weight W. Water bug B is twice as big as bug A, in all dimensions. That is, bug B is twice as long8qrtd7qra8 z;h+u+ aa , twice as wide, etc. What is the weight of bug B?

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37#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Certain insects, such as the water bug,rp ue4psi,sw4v 2fk61 are sufficiently lightweight that they can run on top of water without breaking the surface tension. This is possible because the water, due to surface tension, exerts an upward force on the bottom of the bug's feet. Suppose that the maximum possible upward force on the feet of water bug A is F. Now suppose that water bug B is twice as big as bug A in every dimen2k16ip4ep4 v sus,fr wsion. That is, bug B is twice as long, twice as wide, etc. What is the maximum upward force on the feet of bug B?

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38#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A plastic block of dimens6/ce09n fp1c4zlszk o ions 2.00 cm x 3.00 cm x 4.00 cm has a mass of 30.0 g. What is its density?o c 6lez4p/91snc0kzf

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39#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A liquid has a specific gravity of 0.357. What is its k) s0 ia3s0;sh*xpswddensity?

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40#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A brick weighs 50.0 N, and measures 30.0 cm x 10.0 ;a6ss zgao ek4zqki02 u,x ,w-cm x 4.00 cm. What is the maximum pressure it can exert on a horizontal surfaceqk2 ez4 i,-kxo s6wg0au;saz,?

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41#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A person weighing 900 N is standing on snowshoes. Each snowshoe has ae, up1rn 4vln7rea $2500 \; cm^{2}$. What is the pressure on the snow?

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42#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much pressure (absolute) must a submarine withstand99ou(lkj +964mivbd lln9maj at a depth of 120.0 m in tlkai+ 949 oj 99jndvbllm(u6 mhe ocean?

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43#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A circular window of 30 cm diameter in a submarine can withstan f15g2;bd)hp) q agvzj0 d.fgud a maximum force ob)aqf p2gz g;gju51d h. )vdf0f $5.20 \times 10^{5} \; N$. What is the maximum depth in a lake to which the submarine can go without damaging the window?

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44#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the gauge pressure if the abrhrz h)h/iqe d rr ;ayy5;s159solute pressure is 300 kPa?

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45#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the gauge pressure at a location 15.0 m below the surface of oxapcy+ u,r cr s1e(h(-t (qz,sea? (The density of sea e-ty,c(, qc ps(+1(zhoruaxrwater is $1.03 \times 10^3 \; kg/m^{3}$.)

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46#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  What is the absolute pressure at a location 15.0 m below thd)trp4lt, m-u e surface of sea? (The densilt4md-r)t,u p ty of seawater is $1.03 \times 10^3 \; kg/m^{3}$.)

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47#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 500-N weight sits on the small piston of cd0ytxg tnr,y5nd0+ *a hydraulic machine. The small piston has areattd, 0+c5*ynydrx gn0 $2.0 \; cm^{2}$. If the large piston has area $40 \; cm^{2}$, how much weight can the large piston support?

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48#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  In a hydraulic garage lift, the smyhyf,sf.)*;ktm)ph t 6e; hc aall piston has a radius of 5.0 cm and the large piston has a radius of 15 cm. What force must be applied on the p*smf6 fyhyahh,;te);ktc . )small piston in order to lift a car weighing 20,000 N on the large piston?

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49#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 13,000 N vehicle is to be lifted by a 25 cm diameter hydraulic piston.no hmb c)mz g:8rb:+,h What force needs to be applied to a 5.0 cm diameter piston to accomplish h)m::z+b h8cborngm, this?

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50#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The small piston of a hydraulic lift has+ ahcpir /dh7- a diameter of 8.0 cm, and its large piston has a diameter of 40 cm. The lift raises a load of 15,00a/c- p+ r7ihdh0 N.
(a) Determine the force that must be applied to the small piston    $N$ (fill in numerical value only)
(b) Determine the pressure applied to the fluid in the lift    $\times 10^5 \; Pa$ (fill in numerical value only)

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51#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A block of metal weighs 40 N in air and 3keykl5ah m -83t7a+pi0+kh nq li- px70 N in water. What is the buoyant force of the wa-+ll0-i + mhxe5ky kp7 ta qkhn3ia7p8ter?

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52#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An object has a volume of vl sh vkc2v *q7/bb-s;6kf7 ny$4.0 \; m^{3}$ and weighs 40,000 N. What will its weight be in water?

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53#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 4.00-kg cylinder of solid iron is supported by a string whvsee)a5iry8q l7+7 uyile submerged in water. What is the tension in the string? (The specific ye7eu a85vilq+ 7)syrgravity of iron is 7.86.)

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54#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  If the density of gold is*4bj8gc2bag :+ ytpa6s k; dhc $19.3 \times 10^3 kg/m^{3}$, what buoyant force does a 0.60-kg gold crown experience when it is immersed in water?

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55#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A crane lifts a steel submari(/xoct.wl y uq11 qw9nne (density = $7.8 \times 10^3 \; kg/m^{3}$) of mass 20,000 kg. What is the tension in the lifting cable (1) when the submarine is submerged, and (2) when it is entirely out of the water?

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56#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An object weighs 7.84 N when it is in air and 6.86 N when it is immersed in wateph-82nk/ tam n3ez0emr. What is the specific gravity of the p/3 0 -zmehn at2en8kmobject?

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57#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A container of water is placed on a sc7-qn1z re2m6h9ns y6w5vrokm a yaq+.ale, and the scale reads 120 g. Now a 20-g piece of copper (specific gravity = 8.9)5h166 ae2qrnmz. -an rowq 7 9kyyms+v is suspended from a thread and lowered into the water, not touching
the bottom of the container. What will the scale now read?

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58#
 
填空题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A piece of aluminum with a mass of ql b5 n*p/a9us1.0 kg and density of $2700 \; kg/m^{3}$ is suspended from a string and then completely immersed in a container of water. The density of water is $1000 \; kg/m^{3}$.
(a) Determine the volume of the piece of aluminum    $\times 10^{-4} \; m^3$ (fill in numerical value only)
(b) Determine the tension in the string after the metal is immersed in the container of water $N$ (fill in numerical value only)

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59#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A cylindrical rod of length 12 cm and diameter 2.0 cm w08*qt .vyvbkgq3x ad5ill just barely float in water. What is i*tx8 qbq 5 .gvdavky30ts mass?

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60#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A rectangular box of negligible mass measures 5.b+ 7(oq vuaps4*l3ak42rj;5jbsk tn n0 m long, 1.0 m wide, and 0.50 m high. How many kilograms kbujlv* aa7oj2stk 5;+pn 4rs4q (nb3 of mass can be loaded onto the box before it sinks in a lake?

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61#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A $1.0 m^{3}$ object floats in water with 20% of it above the waterline. What does the object weigh out of the water?

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62#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An object floats with half its volume beneath tpc/ub, 5r)pi ) zgzg(che surface of the water. The weight ocz5upr),i/g( zgpc b) f the displaced water is 2000 N. What is the weight of the object?

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63#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A solid object floats in water with three-fourths of its volumepih 7c/ga -v7fp h*pj8 beneath the surface. What i/77 8j-hvhpafgpp c* is the object's density?

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64#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A 200-N object floats with th)k-(i x3b*hg l;vyfr)aegk+nree-fourths of its volume beneath the surface of the water. Wh g*f -klh+xbv3i)re a)( gkn;yat is the buoyant force on the object?

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65#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A polar bear of mass 200 kg stands on an ,u1y,a cgkh*h7p * z,uo,d hm9f2wmalice floe 100 cm thick. What is the minimum area of the floe that will just support the bear in saltwater of specific gravity 1.03? The specific gra y*1zg,lcp duf7o9m*h h,waahm,,2u kvity of ice is 0.98.

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66#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Liquid flows through a pipe of diameter 3.0 cm at 2.d dabz1- -8o7togxo1p6v xpv 30 m/s. Find the flow rate.

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67#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Liquid flows through a 4.0 cm diameter pipe at 1.0 m/s. There ) . l g c1cvmbo8we639pqph5geis a 2.0 cm diameter restriction icg bmel.ovw5q3pg916) p ec 8hn the line. What is the velocity in this restriction?

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68#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Water flows at 12 m/s in a horizontal pipe with a6n8 7j54 z4eonkz6s1bsb7w qce lfbz: pressure of $3.0 \times 10^4 \; N/m^2$. If the pipe widens to twice its original radius, what is the pressure in the wider section?

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69#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  How much pressure does it take for a puq/*0zpk l bvqf* fp24ymp to supply a drinking fountain with 300 kPa, if the fountain is 30.0 m above the 0b *yqp lq/pf4*vf k2zpump?

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70#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A hole of radius 1.0 mm occurs in the bottom of a water st0 c9 8b l9dpph2xcple:orage tank that holds water at a depth of 15 m. At what rate wil: 2h cb8e9pc0lpxdp 9ll water flow out of the hole?

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71#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Water flows through a horizontal pipe of cross- 3l05rooeg,hw22cyo xsectional area $10.0 \; cm^{2}$ at a pressure of 0.250 atm. The flow rate is $1.00 \times 10^{-3} \; m^{3}/s$. At a valve, the effective cross-sectional area of the pipe is reduced to $5.00 \; cm^{2}$. What is the pressure at the valve?

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72#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  SAE No. 10 oil has a viscosity of 0.20 Pa-s. How long would it tak.mfpjv7es*dqi h;4 )sji )jl-e to pour 4.0 L of oil through a funnel with a neck 15 cm long and 2.0 cm in diameter? Assume the surface of the oil is kept 6 cm above the top of the neck, and neglect any drag effects due to the upper part ofph*ij sq7dlsj ) v.i-e ;fjm4) the funnel.

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73#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Suppose that the build-up of fatty tissue on the wall of amghzwx:i4 .eyr5, fq, k2 hhb5n artery decreased the radi,2b4iyke, h5hr5q xm. f:hwz gus by 10%. By how much would the pressure provided by the heart have to be increased to maintain a constant blood flow?

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74#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Two narrow tubes are placed in a pan 4joezeh fq+ k/k*/)qc of water. Tube A has twice the diameter of tube B. If water rijefz ce4k)+oq/q/* hkses 24 cm in tube A, how high will it rise in tube B?

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75#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  The surface tension of water is 0.073 N/m. How high will wa wlqw (vices(m0+98l 8 l3laaeter rise in a capillary tube of diameter 1.e l(mwsv3qc8awai l 9(8e0l l+2 mm?

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76#
 
  232

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77#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  To what height would water at 0 dg/ fpkt6vr2sz-1s (ol+ wl) 1v fki3eoegree Celsius rise in a glass capillary tube with a diameteokpletf3(io2/fsrk sv w 61l)-g+v1zr of
0.50 mm?

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78#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  A narrow tube is placed vertically in a pan of water, and the water rise- (zl 7xtn:qyks in the tube to 4.0 cm above the level of the pan. The surface tension in the liquid is lowered to one-half its original value by the addition of some soap. What happens to the height of thelk: 7z (qtny-x liquid column in the tube?

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79#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  Consider a rectangular frame of length 0.120 m and width 0.600 m wwbqd1wu k) p:rxc02v,ith a soap film formed within its confined area. If the surface tension of soapy water is 0.0260 N/m, how much force does the soap film exvx bku:2 , qp)01cwrwdert on the 0.600 m side?

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80#
 
单选题 ( 1.0 分) 切至整卷模式 搜藏此题  
  An adjustable rectangular frame has length 12 cm an3e 3t3fmaek 3zd width 5 cm, and is built in such a way that one of the longer sides can be moved without bursting the soap film contained in the frafme333z a 3ektme. Soapy water has surface tension 0.026 N/m. How much work is required to move the adjustable long side so that the frame is 12 cm square?

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